How does it stack up in crash testing?*
Very well, apparently. They crashed a car, then thought about getting a waiver on the front end crash structure. The tests were so definitive that the car passed. There were no specific figures given.
That is not to say it will be inexpensive to fix the car after an accident. The crash test did not affect the tub, however if the tub were damaged, it would need to be replaced. Repair costs are roughly the same as those required for a BMW or similar car.